Verified for bionic. apt-cache policy cups-daemon cups-daemon: Installed: 2.2.7-1ubuntu2.6
lp -d PDF /usr/share/cups/data/default.pdf
PreserveJobHistory 30: I [04/Jun/2019:08:52:25 +0000] [Job 1] Job completed D [04/Jun/2019:08:52:56 +0000] [Job 1] Removing from history.
PreserveJobHistory No: I [04/Jun/2019:08:53:58 +0000] [Job 2] Job completed. D [04/Jun/2019:08:53:58 +0000] [Job 2] Removing from history.
PreserveJobHistory Yes: I [04/Jun/2019:08:54:55 +0000] [Job 5] Job completed. (...)
Verified for bionic.
apt-cache policy cups-daemon
cups-daemon:
Installed: 2.2.7-1ubuntu2.6
lp -d PDF /usr/share/ cups/data/ default. pdf
PreserveJobHistory 30: 2019:08: 52:25 +0000] [Job 1] Job completed 2019:08: 52:56 +0000] [Job 1] Removing from history.
I [04/Jun/
D [04/Jun/
PreserveJobHistory No: 2019:08: 53:58 +0000] [Job 2] Job completed. 2019:08: 53:58 +0000] [Job 2] Removing from history.
I [04/Jun/
D [04/Jun/
PreserveJobHistory Yes: 2019:08: 54:55 +0000] [Job 5] Job completed.
I [04/Jun/
(...)